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Quality, workmanship, dimensions, performance. Class A for prevention of draughts or ingress of water into wall or pitched roof structures, Class B for temporary purposes such as protection of concrete during curing.
| Author | BSI |
|---|---|
| Editor | BSI |
| Document type | Standard |
| Format | File |
| Confirmation date | 2015-05-01 |
| EAN ISBN | 0 580 07412 9 |
| ICS | 91.100.99 : Other construction materials
|
| Number of pages | 10 |
| Modified by | AMD 3519 published March 1981 effective March 1981 Free of charge incorporated |
| Year | 1970 |
| Country | United Kingdom |
| Keyword | BS 1521 ; BS1521 |