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Powder Additives for Concrete, Postmix, Screeds, Mortars and Repair

UKCP powder solutions are dry additives and compounds for precast concrete, postmix and grout manufacture, screeds, dry mix mortars and concrete repair. The range includes accelerators, an early strength activator, a grout additive, a sachet dosed screed admixture, FASTSET repair compounds and mortar additives.

View all 12 products Powder Solutions Datasheets
Pile of fine grey powder representing UKCP powder additives

At a glance

  • Accelerators for precast and postmix
  • Rapid setting concrete repair compounds
  • Powder air entrainer and water retainer for dry mortars
  • Bespoke blends in paper sacks or bulk bags

Powder Solutions Products

There are 12 products in this collection. Select a product for full details, technical data and its downloadable datasheet.

Box of PSA water soluble sachets from UK Construction Products

Powder Screed Admixtures

PSA

PSA is a powder screed admixture supplied in water soluble sachets, formulated to give rapid drying and improved strength in traditional sand and cement screeds. Screeds can be lightly trafficked after 24 hours and achieve compressive strengths above 25 N/mm².

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Icon of a trowel filling a crack in concrete, with a stopwatch showing the 5 to 10 minute set time of FASTSET 1

Powder Concrete Repair

FASTSET 1

FASTSET 1 (FASTSET FS1) is a polymer modified, cementitious repair compound for cosmetic concrete repair. It sets within 5 to 10 minutes, depending on temperature, to suit the rapid repair of concrete structures. It conforms to Class R3 of EN 1504-3.

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Icon of a trowel filling a crack in concrete, with a stopwatch showing the 30 minute set time of FASTSET 30

Powder Concrete Repair

FASTSET 30

FASTSET 30 (FASTSET FS30) is a polymer modified, cementitious repair compound for cosmetic concrete repair. It sets within 20 to 30 minutes, depending on temperature, giving more working time than FASTSET 1 while still allowing a rapid repair. It conforms to Class R3 of EN 1504-3.

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Icon of a trowel filling a crack in concrete, with a stopwatch showing the 2 hour set time of FASTSET FS120

Powder Concrete Repair

FASTSET FS120

FASTSET FS120 is a polymer modified, cementitious repair compound for cosmetic concrete repair. It sets in 2 hours at 20°C, giving time for larger quantities of repairs, followed by rapid strength gain. It conforms to Class R3 of EN 1504-3.

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Icon of a trowel repairing cracked reinforced concrete, with a stopwatch showing the 30 minute set time of FASTSET R4 (30)

Powder Concrete Repair

FASTSET R4 (30)

FASTSET R4 (30) is a polymer modified, cementitious repair compound that meets the requirements for Class R4 EN 1504-3 high strength and high build repair mortars. It sets within 20 to 30 minutes, depending on temperature, with extremely high early strengths.

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Powder AEA air entraining admixture for dry mix mortar from UK Construction Products

Powder Mortar Admixtures

Powder AEA

Powder AEA is a powder air entraining admixture for mortars, designed to be blended with the dry ingredients of bagged and silo mortars. As an air entrainer, it stabilises very small air bubbles when the mortar is mixed, which typically improves workability, cohesion and freeze thaw durability.

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Powder Water Retainer additive for dry mix mortars from UK Construction Products

Powder Mortar Admixtures

Powder Water Retainer

Powder Water Retainer is a water retaining additive for dry mix mortars. Water retainers help fresh mortar hold on to its mixing water, which improves workability, open time and adhesion and reduces the risk of premature drying on absorbent substrates.

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Gauge icon representing UKCP Rapid Set high early strength additive

Powder Concrete Admixtures

UKCP Rapid Set

UKCP Rapid Set is a highly active, rapid set, high early strength cement additive for Portland cement systems. It accelerates precast and ready mixed concrete and activates GGBS, allowing 75% cement replacement without compromising early strength development.

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Rising strength chart icon representing Xpress early strength activator

Powder Precast Admixtures

Xpress

Xpress is an early strength activator for precast concrete based on CEMI and GGBS binder systems. It boosts early age strengths where at least 50% GGBS is used, improving handling and reducing breakages in semi-dry units such as blocks and bricks.

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Fence post set in concrete icon for Accelerator A postmix additive

Powder Postmix and Grout Additives

Accelerator A

Accelerator A is a rapid set, high early strength cement additive for Postmix. Based on a blend of inorganic ultra-rapid set accelerators, it gives set times from 5 minutes at 20°C and very high early strengths in Portland cement systems.

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Fence post set in concrete icon for Accelerator PMA postmix additive

Powder Postmix and Grout Additives

Accelerator PMA

Accelerator PMA is a rapid set, high early strength cement additive for Postmix. Based on a blend of inorganic ultra-rapid set accelerators, it gives set times from 5 minutes at 20°C and very high early strengths in Portland cement systems.

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Flowing waves icon representing Grout Aid fluid grout additive

Powder Postmix and Grout Additives

Grout Aid

Grout Aid is a black box blend of additives for manufacturing cementitious pourable grouts. Blended with cement and sand, it produces a highly fluid, shrinkage compensated grout with little or no bleed.

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Need the technical data?

Download the datasheets for all 12 powder products, or request a sample to try on your next job.

Datasheets Request a Sample

UKCP powder solutions are dry additives and compounds for precast concrete, bagged products, screeds, dry mix mortars and concrete repair. Powder formats suit manufacturers who build additives into their products, and site teams who want simple, pre-measured dosing.

What is in the powder solutions range?

How do I choose the right powder product?

Product Used in Main purpose Key facts
UKCP Rapid Set Precast and readymix concrete Rapid set and high early strength Set from 5 minutes at 20°C, GGBS at 75% replacement
Xpress Semi-dry and structural precast Early strength with GGBS Minimum 50% GGBS, fewer breakages
Accelerator A Postmix Replaces HAC and CSA cements Set from 5 minutes at 20°C
Accelerator PMA Postmix Replaces HAC and CSA cements Set from 5 minutes at 20°C
Grout Aid Pourable grouts Flow and shrinkage compensation Typically 50kg per tonne
PSA Sand and cement screeds Rapid drying and improved strength Light traffic after 24 hours, above 25 N/mm², 200g sachets
FASTSET 1 Concrete Cosmetic concrete repair Sets in 5 to 10 minutes
FASTSET 30 Concrete Cosmetic concrete repair Sets in 20 to 30 minutes
FASTSET FS120 Concrete Cosmetic concrete repair Sets in about 2 hours
FASTSET R4 (30) Concrete High strength, high build repair Class R4 to EN 1504-3
Powder AEA Dry mix mortars Air entrainment Workability, cohesion and freeze thaw durability
Powder Water Retainer Dry mix mortars Water retention Workability, open time and adhesion

Who are UKCP powder solutions for?

  • Dry bagged mortar manufacturers building air entrainers, water retainers and other additives into their products
  • Silo mortar producers supplying mortar in bulk
  • Screed contractors who prefer sachet dosing on site
  • Precast and readymix producers who need faster set, early strength or higher GGBS content
  • Postmix and grout manufacturers replacing HAC and CSA cements or building grout additives into a dry blend
  • Contractors and precast producers making quick concrete repairs
  • Builders merchants supplying these trades

Why choose a powder format?

Powders can be blended with the sand, cement and fillers during manufacture, so the end user only adds water. That gives consistent performance from bag to bag. On site, pre-measured formats such as PSA sachets remove the need to measure, reducing dosing errors.

If you mix on site with liquid dosing equipment, our liquid solutions may suit you better.

Bespoke powder blends

UKCP offers a wide range of additives, including powder air entrainers, rapid set accelerators, retarders, water repellents and blends to suit customer needs. Our in-house development team uses the raw materials from your own production site to create additive and admixture packages.

Instead of sourcing several small addition materials from different suppliers, you receive a single bespoke "black box" additive, blended and supplied in paper sacks or bulk bags, ready to mix with the sand, cement and fillers you already use.

Technical support

With over 30 years' technical experience developing additives and admixtures for dry mortars, silo mortars and concrete applications, our technical support team can help with dosage, formulation and application. Each product is summarised in our technical datasheets, and you can request a sample to test any product with your materials.

Powder Solutions FAQs

Answers to common questions about this collection. For advice on a specific mix or project, contact our technical team.

What are powder construction additives?
Powder additives are dry materials added to cementitious products to change how they behave, such as speeding up drying, entraining air or retaining water. Because they are dry, they can be blended into a dry mortar during manufacture or added on site in pre-measured form.

Which UKCP powder products are for screeds?
PSA is a powder screed admixture supplied in 200g water soluble sachets. It provides rapid drying and improved strength in traditional sand and cement screeds, which can be lightly trafficked after 24 hours.

Can UKCP create a custom powder blend?
Yes. UKCP develops bespoke black box additives in powder or liquid form using the raw materials from your own production site. Blends are supplied in paper sacks or bulk bags, ready to mix with the sand, cement and fillers you already use.

Which FASTSET product should I choose?
Choose by working time. FASTSET 1 sets in 5 to 10 minutes, FASTSET 30 in 20 to 30 minutes and FASTSET FS120 in about 2 hours, depending on temperature. FASTSET R4 (30) sets in 20 to 30 minutes and meets Class R4 of EN 1504-3 for high strength, high build repairs.

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