NBS Source
List your products
Stopgap Fill and Prime

A two component, fast drying flexible cement based primer suitable for use over raised access panels and substrates with well bonded, waterproof residues of adhesives prior to the direct application of Stopgap 700 Superflex or Stopgap 1200 Pro.

Sets rapidly and is ready to receive foot traffic in 60 minutes. Once cured, the flexible nature of the product will accommodate movement within the substrate.

Suitable also for a wide range of other subfloor types including Stopgap waterproof surface membranes, sand/ cement screed, concrete, sound asphalt, granolithic, terrazzo, epoxy and polyurethane resins, ceramic and quarry tiles.


  • Fast drying.
  • Application thickness up to 1 mm on horizontal surfaces.
  • Excellent flexibility.
  • Thixotropic to allow filling of joints up to 4 mm wide.

General information


Fast drying

Application thickness up to 1 mm on horizontal surfaces

Excellent flexibility

Thixotropic to allow filling of joints up to 4 mm wide

Uniclass 2015

Pr_35_31_66_30 Floor covering primersPrimary


K41/110 Raised access floor

K41/120 Raised access floor

K41/130 Raised access floor

K41/390 Sundry accessories

M10/157 Proprietary surfacing to lightweight aggregate levelling screeds M10/

M40/460 Smoothing underlayment

M41/110 Terrazzo tiling

M41/120 In situ terrazzo

M41/130 Precast terrazzo

M42/10 Wood flooring

M42/110 Wood block flooring

M42/120 Mosaic parquet panel flooring

M42/150 Composition block flooring

M42/20 Composition block flooring

M50/110 Resilient floor tiling

M50/45 Existing floor covering removed

M50/460 Smoothing/ levelling underlayment compound

M51/110 Carpeting

M51/150 Carpeting for stairs

Specification data - Floor covering primers

Product Reference

Stopgap Fill and Prime

Standard product features


8.5 m² (approximately) at a thickness of 0.5 mm.

Drying time:

60–120 minutes.

Similar products from Ball, F and Co Ltd