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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 Solutions 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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Form
Powder
Category
Concrete Repair
Manufacturer
UKCP

Key Benefits

  • Rapid set times, approximately 20 minutes at 20°C
  • More working time to shape and profile than FASTSET 1
  • Very high early strengths
  • Low shrinkage
  • High bond strength
  • Non-corrosive, compatible for use with steel reinforcement
  • Supplied in 15kg paper sacks

Typical Applications

  • Cosmetic concrete repair
  • Rapid repair of damaged surfaces in precast concrete
  • Repair of in-situ concrete
  • Filling surface voids and blowholes
  • Concrete pipe spigots and sockets
  • Damaged concrete floors and steps

What is FASTSET 30?

FASTSET 30, also referred to as FASTSET FS30, is a polymer modified, cementitious repair compound for cosmetic concrete repair. It sets within 20 to 30 minutes, depending on temperature, to suit rapid repair of concrete structures, and it conforms to Class R3 of EN 1504-3.

Like FASTSET 1, it contains special cements that provide a rapid set and very high early strengths, and powder polymers that provide strong adhesion to the substrate along with improved surface hardness. The difference is working time. FASTSET 30 sets within 20 to 30 minutes rather than 5 to 10 minutes, which makes it easier to use on repairs that need careful shaping.

Where is FASTSET 30 used?

FASTSET 30 has been developed for precast applications where rapid repair to damaged surfaces is required. Mixed with water, it is applied to damaged areas and can be shaped and profiled to provide a seamless repair. Main application areas are the repair of in-situ and precast concrete, including:

  • Filling surface voids and blowholes
  • Concrete pipe spigots and sockets
  • Damaged concrete floors and steps

For structural repairs, or where reinforcement is exposed, talk to our technical support team before starting work.

How to use FASTSET 30

  1. Prepare the surface. Make sure it is sound, clean and free from laitance, loose materials, oil, grease and other surface contaminants. If necessary, hack the surface back to a sound substrate.
  2. Damp down. Wet the surface with clean water to reduce suction.
  3. Prime difficult substrates. For improved adhesion, brush on a slurry of water and FASTSET 30 mixed at 1:4 by volume.
  4. Mix. In a clean container, add water to the powder in small quantities until the desired consistency is achieved. The typical water to powder ratio is 1:5 by weight.
  5. Apply and shape. Use the working time to shape and profile the repair to match the surrounding concrete.

Do not mix more material than can be used within the setting time. The recommended minimum application temperature is 5°C, and a 10kg pack gives an approximate yield of 5.10 litres. Mix ratios are typical and vary with the application, so confirm them with trials and our technical team.

Our guide to carrying out a rapid cosmetic concrete repair with FASTSET takes you through the process step by step.

Health and safety

Refer to the FASTSET 30 Safety Data Sheet, available on request, for full instructions. Wear suitable PPE, including gloves and goggles, when handling.

Packaging, storage and shelf life

FASTSET 30 is supplied in 15kg paper sacks. Avoid storing at temperatures below 5°C or above 30°C. When stored correctly, it has a shelf life of 12 months from date of manufacture.

Which FASTSET is right for the job?

Setting time Best for
FASTSET 1 5 to 10 minutes Fastest possible cosmetic repair
FASTSET 30 20 to 30 minutes Repairs that need shaping time
FASTSET R4 (30) 20 to 30 minutes Class R4 high strength, high build repairs
FASTSET FS120 120 minutes Larger quantities of repairs

Browse the full concrete repair range to compare them side by side.

Need help choosing? Talk to our technical support team, or request a sample to try FASTSET 30 for yourself.

FASTSET 30 FAQs

Common questions about FASTSET 30. For project specific advice, contact our technical team.

What is FASTSET 30?
FASTSET 30, also known as FASTSET FS30, is a polymer modified, cementitious repair compound for cosmetic concrete repair. It sets within 20 to 30 minutes, depending on temperature, and uses special cements and powder polymers for very high early strength, strong adhesion and improved surface hardness. It conforms to Class R3 of EN 1504-3.

How long does FASTSET 30 take to set?
FASTSET 30 sets within 20 to 30 minutes, depending on temperature, and in approximately 20 minutes at 20°C. Higher temperatures shorten the setting time and lower temperatures extend it, so plan the size of each mix around the conditions on the day.

When should I choose FASTSET 30 instead of another FASTSET?
Choose FASTSET 30 when you need more time to place, shape and profile the repair than FASTSET 1 allows, as FASTSET 1 sets within 5 to 10 minutes. FASTSET R4 (30) has a similar setting time and meets Class R4 of EN 1504-3. For a controlled 2 hour set, look at FASTSET FS120.

What is the mix ratio for FASTSET 30?
The typical water to powder ratio is 1:5 by weight, adjusted to suit the consistency your application needs. A 10kg pack gives an approximate yield of 5.10 litres. Confirm the mix with trials and ask our technical team if you need advice.

Can FASTSET 30 be used for structural concrete repair?
FASTSET 30 is formulated for cosmetic concrete repair. It is non-corrosive and compatible for use with steel reinforcement, but for structural repairs, repairs around exposed reinforcement or any repair to a load bearing element, contact our technical support team for advice first.

How is FASTSET 30 supplied and stored?
FASTSET 30 is supplied in 15kg paper sacks. Avoid storing below 5°C or above 30°C. Stored correctly, it has a shelf life of 12 months from date of manufacture.

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Guides and Insights

Further reading from the UKCP team, starting with guidance on FASTSET 30.

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