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NBS Source
Stopgap 300 HD

Application

Suitable:

  • For use in light to heavy-duty areas for preparing sound absorbent and non-absorbent subfloors prior to the installation of new floorcoverings.
  • For use over a wide range of subfloor types including sand/ cement screed, concrete, calcium sulphate (e.g. anhydrite), minimal adhesive residues, sound asphalt, granolithic, terrazzo, epoxy and polyurethane resins, ceramic and quarry tiles and STOPGAP waterproof surface membranes.

Description

STOPGAP 300 is a fast drying, self-levelling smoothing underlayment.

STOPGAP 300 is dimensionally stable and is supplied as a pre-blended dry powder designed for application between 2–20 mm. It is protein-free which allows it to be used in biologically sensitive areas such as hospitals.


Priming:

  • IT IS ESSENTIAL TO PRIME ALL SURFACES.
  • Absorbent surfaces - Prime with dilute STOPGAP P131 to prevent rapid drying of the underlayment.
  • For dry (<75% RH) and suitably prepared calcium sulphate screeds, prime with two coats of STOPGAP P121. The first coat should be diluted 1 part primer to 1 part water. Once dry, prime with a second coat of neat STOPGAP P121.
  • Non-absorbent surfaces – such as sound asphalt, minimal adhesive residues, terrazzo, quarry tiles and STOPGAP waterproof surface membranes should be primed with neat STOPGAP P131 to ensure that good adhesion is obtained between the underlayment and substrate.
  • Primers should be used in accordance with instructions printed on the bottle and must be allowed to dry before applying the smoothing underlayment.

General information

Finish

Smooth

Shape

Formless

Uniclass

Pr_35_31_06_80 Smoothing and levelling underlay compoundsPrimary

CAWS

M10/160 Proprietary self smoothing levelling screeds

M10/7 Proprietary quick drying levelling screeds

M40/460 Smoothing underlayment

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

M51/150 Carpeting for stairs

Specification data - Smoothing and levelling underlay compounds

Standards

To EN 13813:2002.

CT-C35-F7.

Working time

20–30 minutes at +20°C.

Setting time

90 minutes at +20°C.

Consumption (per layer applied)

1.67 kg/m² per mm thickness.

Compressive strength - 1 day

To EN13892-2.

>20.0 N/mm².

Compressive strength - 7 days

To EN13892-2.

>25.0 N/mm².

Compressive strength - 28 days

To EN13892-2.

>35.0 N/mm².

Flexural strength

To EN13892-2.

1 Day: >3.0 N/mm²; 7 Days: >5.0 N/mm²; 28 Days: >8.0 N/mm².

Digital objects

Platform Compatible Version Certified to
Revit

Revit 2017

4

2.0
IFC
-

4

2.0
Download now from NBS National BIM Library

Literature

Flooring Installation Products

Flooring Installation Products

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